It's the same as saying "people need food to live; why not raise the price of food indefinitely to have better wages for people who produce food?"
The answer (thank goodness) is: competition.
You are a consumer more than you are a worker. Every industry that brings in automation and reduced costs can offer you goods for less, or pay their workers the same for more. Competition means they tend to choose the former (or, given there's also competition for workers, actually wages go up a bit and prices come down a bit, but there are slightly fewer jobs).
The answer (thank goodness) is: competition.
You are a consumer more than you are a worker. Every industry that brings in automation and reduced costs can offer you goods for less, or pay their workers the same for more. Competition means they tend to choose the former (or, given there's also competition for workers, actually wages go up a bit and prices come down a bit, but there are slightly fewer jobs).